AllNightNerding: What I am looking at doing is having a Excel document which I can write everything up in, and then import that into OSCommerce. Is that possible?

For the initial setup I don't see why not, you may have to export the data into CSV format to input properly. If you wanted to do this on a more regular basis (ie FTP an Excel document which would then be processed) you'd need a custom script written.

Gets alittle more tricky if the Excel file also has product images in it...